Preserve OST file location in new installation?

Outlook version
Outlook 2016 64 bit
Email Account
IMAP
I use Office 365 (desktop), and currently my various *.ost files are located in F:\Libraries\Documents\Office\Outlook.

I'm planning on a fresh Windows reinstall, and reinstall applications as required. When it comes to Outlook, it will create new *.ost files in the default location.

Is there a way to specify the default location before adding accounts in Outlook? I understand that the existing *.ost files can't be re-used, so is there a way to preserve the emails in the current *.ost files? There are 3, and the respective file sizes are 191/413MB and 1.22GB. So a fair amount of emails.

Any suggestions will be welcomed.

Thanks.
 

Diane Poremsky

Senior Member
Outlook version
Outlook 2016 32 bit
Email Account
Office 365 Exchange
Export the profile from the registry - restore it then you can reuse the ost files.

If you want to make new ost file, you can set the default location using either a registry key or a junction point.
Moving an Exchange Offline Data File (*.ost)
 
Outlook version
Outlook 2016 64 bit
Email Account
IMAP
Thank you.

By registry profile, do you mean this:
Computer\HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Outlook

And do I restore it before\after I've reinstalled Outlook?
 
Outlook version
Outlook 2016 64 bit
Email Account
IMAP
Or is it
Computer\HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Outlook \Profiles

The ForceOSTPath string value is in Computer\HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Outlook, so I'm not sure which one to export.

Thanks again.
 

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